public class huicvre {
    package com.example.demo;

    class Car{
        Framework framework;
        public Car(int size){
            framework = new Framework(size);
            System.out.println("Car init...");
        }
        public void rum(){
            System.out.println("Car run");
        }
    }
    class Framework{
        Bottom bottom;
        public Framework(int size){
            bottom = new Bottom(size);
            System.out.println("Framework run");
        }
        class Bottom {
            Tire tire;
            public Bottom(int size){
                tire = new Tire(size);
                System.out.println("Bottom run");}
        }
    }
    class Tire{
        private int size;
        public Tire(int size){
            this.size = 17;
            System.out.println("轮胎尺⼨：" + size);
        }
    }
    public class MVC_0727 {
        public static void main(String[] args) {
            Car car = new Car(2);
        }
    }

}
